Electric switch



D. Ll OHARA. ELECTRIC SWITCH. APPLacAT'GN mEn No.1, 191s.

'Emma May1s,1920.

2 SHEETS-SHEET 1.

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ELEGTW; SWITCH.L APPLICATION FIIED DEC. T, i918- A y n y Patented May 18, 1920.

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DANIEL L. UI-LARA, 0F GREENLAND, MICHIGAN.

ELECTRIC SWITCH.

Specification. of Letters Patent. Igltentd :May 18, 1920,

Applicaties flied December 7, 191s. serial No. 265,673.

To allg/whom t may concern.:

Be it known that I, DANIEL L. OHARA,

a citizen of the United States, residing at Greenland, in the county ot Gntonagon and State of Michigan, have invented new and useful Improvements in Electric Switches, of which the following is a specification.

This invention relates to electric switches and the object in view is to provide a safety switch whiolr may be operated without danger of electrocuting the person handling the switch.

A further object of the invention is to provide a switch which cannot be short circuited when water is thrown thereupon, the switch being most admirably adapted Jfor outdoor work of all kinds.

1With the above and other objects in view the invention consists in the novel construction, combination and arrangement herein fully described, illustrated and claimed.

In the accompanying drawing Figure l is a plan View of the complete switch.

Fig. 2 is a transverseL section through the switch.

Fig. 3 is a longitudinal section through the switch.

Fig. 4l is a detail perspective view of one of the blade guides.

Fig. 5 is va perspective view of one of the Contact socket Jfeatures or members.

Fig. 6 is a perspective view of one of the blades. f

Fig. 7 is a perspective View of the yoke and its operating means. Y

Fig. 8 is a perspective View of the shutter and the shutter driving means. L

The improved switch embodies a box or casing l preferably having a movable cover or face plate 2 secured in place by fastening means 3.

Fastened within the casing l are blade guides 4, said guides being arranged in spacedy and parallel relation to each other and `each of said guides being formed of metal, preferably sheet metal bent into the form shown in ythe drawings so as to previde a guiding channel or gnideway and' attaching flanges (5 secured by fastening'k means 7 such as screws to the inside of the casing, one of said fastening means being preferably in the form of a binding post R to whichone of they current wires is to be attached. n'conjunction with each guide l I employ a switch blade 9 which Works in the guideway 5 and is directed in its move.- ment thereby. Y The several blades 9 are provided with li s or flanges 9 and the f are secured kto a common yoke 10 by suitable fastening means ll. This causes all Lof the blades 9 to be concurrently shifted when motion is imparted to the yoke 10. 'The yoke 10 is composed of any suitable insulating or non-conducting material as is also the vcasing l and cover Arranged in longitudinal alinement with the guide .tare end Contact socket pieces or members l2 each of which is preferably formed of sheet metal bent into substantially the same form as the respectiveguide 4, said end contact socket members having `flanges 13 toreceive fastening means 14 for securing the same to the interior of the casing. Each socket member l2 has a socket or guideway l5 for the adjacent end of the respective switch plate thereby insuring broad and perfect contact. One of the fastening members for the end contactk socket member is in the form of a binding post 16 to which one of the` wires is to be attached.

Fastened about centrally to the yoke l() is a block 17 or" non-conducting material such as hard rubber and extending outwardly froml the block 17 is a post 18. The latter has secured thereto the handle 19 by means of ascrew 20. n The post 18 which is also of insulating material works in a slot 21 in the face plate or cover 2 ot' the casing the slot 2l extending in the direction of movement of the switch blade 9. Attached to the postffl isa shutter Q2 which covers thek slot 2li and works between parallel guides 23 secnredto the cover plate 2 by fastening means 24. The shutter 22 always closes the slots 2l in all positions of the switch operating means and prevents ywater from obtaining access to the interior of the casing and causing a short circuit. In prac tice, when the blades 9 are shifted tothe left of Fig. l, andhrought into engagement hroughthefguides im the bades Suitable conduct@ indieaeein hg 2,

, claim; :e- K

KK.'gngementrwthrvthe'SOGkBti member's'ffand ai vf through. n 

